Ventilator



FIG. 1 is a front elevational view of a ventilator showing our new design;

FIG. 2 is another front elevational view thereof, showing the covers in their closed position;

FIG. 3 is a rear elevational view of FIG. 1;

FIG. 4 is a rear elevational view of FIG. 2;

FIG. 5 is a top plan view thereof, the bottom being the same as the top shown;

FIG. 6 is an end elevational view thereof, the opposite end being the same as the end shown.

The broken line representation of a screen and pivotal panels in FIGS. 1, 3 and 4 are for purposes of illustration only. 

The ornamental design for a ventilator, as shown and described. 